Automatic cut-off.



G. M. BROWN.

AUTOMATIC GUT-OFF.

APPLICATION TILED MAR. 27, 1907.

933,880., Pat e nted Sept. 14, 1909.

weniov';

. a. BM.

a/ltormeya.

.ordinary bel CHARLS M. BROWN, {3F CLEVELAND, OHIO.

AUTOMATIC our-ore.

ea'asso;

Specification ofLetters Patent. Patented Sept. 14, N99.

Application filed March 27, 1907. Serial No. 364,764.

To all whom it may concern:

Be it known that I, OIIARLS M. BROWN, a

citizen of the United States, residing atprovide an automatic cut-01f,adapted for.

use in connection with fluid regulators.

More particularly, my object is to provide a simple and effective safetydevice for use in natural as mains and similar locations which may eemployed with practically all 'ypes of pressure regulators, includingthe ones which are now in common use. In producing the invention formingthe subject of this application,- I have had the above objects'in viewand'have kept in mind the fact that the safety device should be oneconstructed of the fewest possible number of parts and capable of readyattachment or insertion to an existing regulating system without in anymanner impairing its efficiency as air-operating device.

An embodiment of my invention is shown in the accompanying drawings inwhich Figure 1 is a side elevation, partly in section, showing thesafety device used with an regulator. Fig. 2 is a detail showing theloop allowing the movement on the part of the regulator within certainlim its without throwing the automatic cut-ofi' into action. a

In installing the device in, for example, a

natural gas main, A, I may locate the cutoff B on the high pressure sideof the controlling device C, which, in the present instance, is shown tobea conventional regulater. But it is to be observed, with theparticular cut-ofi' which I have invented, it is not material that thecut-off be located on the high pressure side of the controller, and

in this it is distinguished from the majority;

the controlling arm and the gas once thrown into action is absolutelyindependent of the controller.

As shown in Fig. 1, the cut-off device l? which I employ may be mountedin a short union section B capable of being let into the pipeconnections at any point. In this section is a 'valve seat designed tobe closed by a swinging flap valve B which hangs in such a manner thatthe gas pressure would tend to hold it to its seat. Rigidly connected toone of the trunnions on which the valve swings is-a controlling arm Boutside of the pipe section andhaving a shoulder B atone end by which itmay be held up in such position that the valve is away from its seat.Pivotally mounted on an adjacent standard is a detent lever D designedto catch the shoulder in the controlling arm B and hold it at such anangle that, when released, the weight of thevalve and the arm will causethem to drop to such position that the valve will bear against its seatand be held thereto both by the weight of pressure bearing thereagainst.v

F or the purpose of tripping the detent lever when the gas pressurecomes to the danger point,.the controller, which is of any suitable typebut which in the present instance is shown as having a bell regulator,

is provided with a loop C which may be attached to the guide rod of anyregulator or controller now in use, this loop being screwed on to theend of the rod and easily adjustable so as to cause it to trip the leverat the desired point. When the gas pressure is'working at or above thenormal point, the pressure regulator or controller is, in the formshown, without effect upon the safety cut-oil", obviously. WVhen,however, the pressure is such that the controlling device is allowed todro to a predetermined point, the loop D attac ed thereto will operatethe detent lever so as to release the valve duced a cut-ofi which iscomposed of the fewest possible number of parts and is capable ofinsertion at ariy'pomt of an existing system and capable of use withpractically all styles of present controlling devices.

Having thus described my invention, I claim: y

An automatic safety cut-ofi' comprising a valve seat, a swinging valveon the ingress side of's'ai'd seat, an arm outside of the-valve casingconnected with said valve and having an abrupt shoulder at its upperend, a pivoted lever having a shoulder adapted to engage with theshoulder on said am and to thereby prevent said arm from swinging in thedirection which will permit the valve to close, a vertically movablewaters'ealed float in the gas-conduit and subject to the pressure ofgas-therein, a stem secured to said float and extending verticallytherefrom and having a shoulder at its upper end which overhangs one armof said leverf In testimony whereof,'1 hereunto affix my signature inthe presence of two witnesses, CHARLS M. BROWN. Witnesses:

E. B. GILCHRIST, E. L. THURSTON.

